Excel, Notion or dedicated software: what to use for budgeting?

Every week someone asks me which tool to use for budgeting. The honest answer is: it depends on where you are. Excel is the best tool for the office that does 3 proposals/month. It's the worst for the office that does 25.

Excel/Sheets: the inevitable start

When it makes sense:

• You're validating the pricing model. You're tweaking formulas every week.
• You do fewer than 8 proposals a month.
• Only one person budgets.
• You don't have a proposal standard yet, every project is different.

Real upsides:

• Zero cost (Sheets) or very low.
• Infinite flexibility for formulas.
• You learn to price by doing it.

Hidden costs:

• Time. Each proposal requires formatting, copying, saving a PDF. Typically 45-90 min per proposal.
• Version control. "Proposal John v3 final FINAL.xlsx", with 6 people, it turns into a nightmare.
• No client trail. You don't know if they opened it, reread it, compared it.
• Manual billing. Each installment is an invoice someone has to remember to generate.

Notion: the ambiguous middle ground

Many offices migrate from Excel to Notion thinking it will solve the problem. It solves part of it:

What it's good for:

• Proposal template library.
• Library of typologies and historical R$/m².
• Centralizing contracts, attachments and communication.
• Status tracking (lightweight CRM).

What it's not good for:

• Calculation. Notion calculates poorly, no chained formulas.
• Professional PDF generation. The templates are limited.
• Automatic billing. It doesn't have it.
• A decent client portal. A published Notion is generic-gray, looks internal, not a sales document.

Notion is a great process tool, bad as a budgeting tool. Many offices end up with Notion + Excel running side by side, the worst of both worlds.

Dedicated software: when it's worth it

When it makes sense:

• You do 8+ proposals/month.
• More than 1 person budgeting.
• You have a consolidated proposal standard.
• Billing and installment management have already become a pain.
• You want to clearly separate sales from delivery.

What good software solves:

• A living table of R$/m² and formulas that apply automatically.
• 3 proposal options with 1 click.
• Consistent professional PDF.
• Tracking: the client opened it, reread it, stayed on section X.
• Digital approval with date and hash.
• Automatic billing (boleto/PIX) of installments.
• Automatic feed into cash flow.

Costs:

• Monthly fee (R$ 80-300/month for most Brazilian options).
• A 1-2 week learning curve.
• Migration of old data (usually optional).

How to decide now

Don't compare tools, compare costs. Add up:

1. Time your team spends budgeting per month (in hours).
2. Multiply by the budgeter's technical-hour rate.
3. Add the "leakage": clients who didn't reply because the proposal was late, installments not billed on time, proposals lost to disorganization.

If the total passes R$ 1,500/month, dedicated software pays for itself. In a 4-person office with 12 proposals/month, it's typically R$ 4,000-8,000/month of hidden cost, for a software of R$ 200/month.

The 5 signs it's time to switch

1. You open 3 tabs to make 1 proposal. Excel + Notion + Word + Drive. Each one with a piece.
2. The client waits more than 48h to receive the proposal. You're rebuilding it from scratch every time.
3. You don't know if the client opened the document.
4. Billing turns into "I need to remember to generate invoice X next week".
5. A new team member takes 2 weeks to budget on their own. There's no written process.

If 3 or more signs match, it's time. If none match, Excel is still serving you well, don't buy a tool because it's trendy.

Next read: A commercial architecture proposal that converts, regardless of the tool, the 9 blocks every proposal needs.